Relationship between the frequency of blood pressure self-measurement and blood pressure reduction with antihypertensive therapy : results of the OLMETEL (OLMEsartan TELemonitoring blood pressure) study

User engagement with home blood pressure monitoring: a multinational cohort using real-world data collected with a connected device

OBJECTIVE

Connected blood pressure (BP) monitors provide reliable data when used properly. Our objective was to analyse the engagement of real-world users with self-measurements.

METHODS

We included adult first-time users of a connected BP monitor from July 2019 to March 2021. They were categorized as persistent users if they continued to use the device between 311 and 400 days after inclusion. We defined a criterion to analyse the timing of self-measurements: at least 12 measurements performed within three consecutive days, at least once every 90 days. Persistent users were clustered by state sequence analysis according to the consistency of their BP monitor measurement timing with this criterion during 1 year of follow-up.

RESULTS

Among the 22 177 included users, 11 869 (54%) were persistent during the first year. Their use was consistent with the timing criterion 25% (median) of this time (first and third quartiles: 0%, 50%) and four patterns of use were identified by clustering: 5215 persistent users (44%) only performed occasional sparse measurements, 4054 (34%) complied at the start of follow-up up to eight cumulated months, 1113 (9%) complied at least once during later follow-up up to eight cumulated months, and the remaining 1487 (13%) complied nine or more cumulated months of follow-up.

CONCLUSION

Although connected BP monitors can collect a high volume of data, the real-life timing of self-measurements is far from recommended schedules. We must promote the use of BP monitors as recommended by guidelines and/or learn to analyse more occasional and sparse measurements.

Effects of self-monitoring devices on blood pressure in older adults with hypertension and diabetes: a randomised controlled trial

BACKGROUND

Hypertension and diabetes frequently coexist, which results in the difficulty of hypertension control in community-dwelling elderly adults who lack effective prevention and control strategies. The aim of this study is to determine whether a combined pedometer and home blood pressure monitoring (HBPM) programme could improve blood pressure (BP) among community-dwelling elderly adults with hypertension and diabetes.

METHODS

The trial was a 2×2 factorial randomised clinical trial that recruited 180 community-dwelling elderly people (aged ≥60) with hypertension and diabetes in Tianjin, China. Participants were randomly assigned to control, pedometer, HBPM, and pedometer+HBPM groups. Intervention period was 12 months. The coprimary outcomes of the study were systolic and diastolic BP; the secondary outcomes included the proportion of patients with controlled hypertension. BP was measured twice in the right arm using a mercurial sphygmomanometer. The mean of these two measurements was taken as the BP value.

RESULTS

At 12 months, compared with the control group, the adjusted differences in least squares mean (95% CI) in systolic and diastolic BP changes for pedometer, HBPM, and pedometer+HBPM groups were -4.2 (-8.4 to 0.1), -2.7 (-6.9 to 1.5) and -8.1 (-12.3 to -3.9) mm Hg (p<0.01); -3.2 (-5.2 to -1.1), -0.1(-2.1 to 1.9) and -3.6 (-5.6 to -1.5) mm Hg (p<0.001), respectively; the adjusted difference in percentage (95% CI) in the controlled hypertension (BP <140/90 mm Hg) for pedometer, HBPM and pedometer+HBPM groups were 7.5 (-12.2 to 27.1), 9.9 (-10.4 to 30.3) and 23.1 (5.0 to 41.1) (p=0.09).

CONCLUSION

Combination pedometer and HBPM interventions can significantly decrease BP levels in elderly adults with hypertension and diabetes.

TRIALS REGISTRATION NUMBER

UMIN000021613.

The effects of home blood pressure monitoring on blood pressure control and treatment planning

OBJECTIVES

Blood pressure monitoring is essential in hypertension, which is an important public health issue. Our objective was to compare the rates of blood pressure control and to investigate factors that affect blood pressure control in patients with hypertension.

METHODS

The records of 1006 patients with hypertension were examined retrospectively. The blood pressure control rates of the 394 patients who measured their blood pressure at home (group 1) and those who did not (group 2) were compared.

RESULTS

In group 1, the mean systolic and diastolic blood pressure was 123.91±12.63/78.64±8.92 mmHg measured at home, whereas it was 140.31±20.56/85.76±11.55 mmHg in the office setting (p<0.0001). In the total group (N=1006), the blood pressure control achievement rate was 56.1%. The number of cardiovascular events, hypertension duration, and the rate of being employed was higher in group 1 (p<0.0001, p<0.0001 and p=0.0001, respectively), while heart rate and grade 3-4 retinopathy was lower in group 1 (p<0.0001 for both) . Occupational status, geographical origin, BMI and the use of angiotensin converting enzyme (ACE) inhibitors were found to be the determinants of office BP control (p<0.05, p<0.05, p=0.001 and p<0.05, respectively), and BMI and grade 3-4 retinopathy findings were found to be the determinants of home BP control (p <0.05 for both).

CONCLUSION

Home blood pressure monitoring is useful in preventing complications and achieving therapy compliance and is essential in diagnosis and treatment planning of hypertension.

Self-blood pressure monitoring in an urban, ethnically diverse population: a randomized clinical trial utilizing the electronic health record

BACKGROUND

Hypertension is a leading risk factor for cardiovascular disease. Although control rates have improved over time, racial/ethnic disparities in hypertension control persist. Self-blood pressure monitoring, by itself, has been shown to be an effective tool in predominantly white populations, but less studied in minority, urban communities. These types of minimally intensive approaches are important to test in all populations, especially those experiencing related health disparities, for broad implementation with limited resources.

METHODS AND RESULTS

The New York City Health Department in partnership with community clinic networks implemented a randomized clinical trial (n=900, 450 per arm) to investigate the effectiveness of self-blood pressure monitoring in medically underserved and largely black and Hispanic participants. Intervention participants received a home blood pressure monitor and training on use, whereas control participants received usual care. After 9 months, systolic blood pressure decreased (intervention, 14.7 mm Hg; control, 14.1 mm Hg; P=0.70). Similar results were observed when incorporating longitudinal data and calculating a mean slope over time. Control was achieved in 38.9% of intervention and 39.1% of control participants at the end of follow-up; the time-to-event experience of achieving blood pressure control in the intervention versus control groups were not different from each other (logrank P value =0.91).

CONCLUSIONS

Self-blood pressure monitoring was not shown to improve control over usual care in this largely minority, urban population. The patient population in this study, which included a high proportion of Hispanics and uninsured persons, is understudied. Results indicate these groups may have additional meaningful barriers to achieving blood pressure control beyond access to the monitor itself.

CLINICAL TRIAL REGISTRATION

http://clinicaltrials.gov. Unique Identifier: NCT01123577.

Managing hypertension in urban underserved subjects using telemedicine--a clinical trial

BACKGROUND

We evaluated an Internet- and telephone-based telemedicine system for reducing blood pressure (BP) in underserved subjects with hypertension.

METHODS

A total of 241 patients with systolic BP ≥140 mm Hg were randomized to usual care (C; n = 121) or telemedicine (T; n = 120). The T group reported BP, heart rate, weight, steps/day, and tobacco use twice weekly. The primary outcome was BP control at 6 months.

RESULTS

Average age was 59.6 years, average body mass index was 33.7 kg/m(2), 79% were female, 81% were African American, 15% were white, 53% were at or below the federal poverty level, 18% were smokers, and 32% had diabetes. Six-month follow-up was achieved in 206 subjects (C: 107, T: 99). Goal BP was achieved in 52.3% in C and 54.5% in T (P = .43). Systolic BP change (C: -13.9 mm Hg, T: -18.2; P = .118) was similar in both groups. Subjects in the T group reported BP 7.7 ± 6.9 d/mo. Results were not affected by age, sex, ethnicity, education, or income. In nondiabetic T subjects, goal BP was achieved in 58.2% compared with 45.2% of diabetic T subjects (P = .024). Nondiabetic T subjects demonstrated a greater reduction in systolic BP (T: -19 ± 20 mm Hg, C: -12 ± 19 mm Hg; P = .037). No difference in BP response between C and T was noted in patients with diabetes.

CONCLUSION

In hypertensive subjects, engagement in a system of care with or without telemedicine resulted in significant BP reduction. Telemedicine for nondiabetic patients resulted in a greater reduction in systolic BP compared with usual care. Telemedicine may be a useful tool for managing hypertension particularly among nondiabetic subjects.

Home blood pressure monitoring in clinical practice: a review

Home blood pressure monitoring is a convenient and inexpensive technique to monitor blood pressure in hypertensive patients. There are convincing data that home blood pressure monitoring is a good predictor of future cardiovascular risk, perhaps better than office blood pressure. Home blood pressure measurement can be standardized using validated instruments and systematic protocols; normative criteria have established home blood pressure >135/85 mm Hg as hypertensive. Home blood pressure monitoring has been shown to improve compliance and blood pressure control, and to reduce health care costs. Ongoing studies are evaluating management of hypertension based on home blood pressure readings compared with traditional office-based readings. Home blood pressure monitoring is particularly useful for evaluation of white coat hypertension and masked hypertension. In this article, we discuss the methodology for measuring blood pressure at home, its comparison to the other measurement techniques, the advantages and disadvantages, cost benefit analyses, and ongoing clinical trials to help define the role of home blood pressure monitoring in the clinical management of hypertension.

[Possibilities of telemedicine in arterial hypertension]

Telemetric blood pressure measurement opens a new dimension of cooperation between physician and patient. It requires clearly defined therapeutic target values. Telemonitoring is judged positively by 93% of patients treated this way for its exact and long-lasting observation mode by the treating physician. A better control of hypertension is possible due to adaption of therapy over a long observation period and exact blood pressure data by the treating physician and a better adherence to therapy by the patients. Besides good technical and logistic feasibility, published studies show a high acceptance both on the part of patients and treating physicians. Randomized, controlled and prospective studies showed significantly better blood pressure control of telemetrically observed patients compared to standard care. Telemedicine was exceptionally effective when combined with regular individualized interventions like phone calls. These data have to be confirmed by large prospective studies including "hard" endpoints and economic aspects. Of special interest is the telemetric observation in high-risk hypertensive patients like those with coronary artery disease, heart failure, cerebrovascular complications, or hypertension in pregnancy.

Impact of patient-general practitioner short-messages-based interaction on the control of hypertension in a follow-up service for low-to-medium risk hypertensive patients: a randomized controlled trial

The evaluation in real-life settings of services for the follow-up and control of hypertensive patients is a complex intervention, which still needs analysis of the roles, tasks, and resources involved in the basic items: patient, healthcare professional, and the interaction between the two. To evaluate the impact of patient-general practitioner (GP) short-messages-based interaction, isolated from other items, on the degree of hypertension control in the follow-up of medium-to-low-risk patients in primary care, a randomized controlled trial has been performed: 38 GPs enrolled 285 hypertensive patients who recorded the results of self-blood-pressure (BP) monitoring, heart rate, and body weight, and completed an optional questionnaire in an identical manner over a six-month period. The telemedicine group (TmG) sent the data to a telemedicine-based system that enabled patient-GP interaction; the control group (CG) recorded the data on paper and could only deliver it to their GP personally in the routine visits. In the TmG, the results were better, but not significantly so, for: 1) degree of hypertension control, in terms of the percentage of uncontrolled hypertensives at the final visit (TmG versus CG: 31.7% versus 35.6%; p = 0.47); 2) reduction in hypertension during follow-up, comparing measurements (performed by a professional) at the initial and final visits of systolic BP (15.5 versus 11.9; p = 0.13) and diastolic BP (9.6 versus 4.4; p = 0.40); and 3) adherence to the protocol within compliance levels of interest in a real-life follow-up service: >>50% (84.8% versus 73.3%) and >>25% (92.4.8% versus 75.4%) ( p = 0.053). Other factors such as average values of self-measured systolic BP, diastolic BP and heart rate, acceptability of the protocol, and median number of consultations and hospital admissions were similar in both groups. Outcomes show that, taken alone, the patient-GP short-messages-based interaction has very little impact on the degree of hypertension control in patients with this profile. In complex interventions, to discriminate the impact of each of its components in isolation will enable us to design an efficient follow-up service, little demanding in terms of healthcare professional dedication, and optimized in other basic aspects.

Changes in home versus clinic blood pressure with antihypertensive treatments: a meta-analysis

Home blood pressure (HBP) monitoring is recommended for assessing the effects of antihypertensive treatment, but it is not clear how the treatment-induced changes in HBP compare with the changes in clinic blood pressure (CBP). We searched PubMed using the terms "home or self-measured blood pressure," and selected articles in which the changes in CBP and HBP (using the upper arm oscillometric method) induced by antihypertensive drugs were presented. We performed a systematic review of 30 articles published before March 2008 that included a total of 6794 subjects. As there was significant heterogeneity in most of the outcomes, a random effects model was used for the meta-analyses. The mean changes (+/-SE) in CBP and HBP (systolic/diastolic) were -15.2+/-0.03/-10.3+/-0.03 mm Hg and -12.2+/-0.04/-8.0+/-0.04 mm Hg respectively, although there were wide varieties of differences in the reduction between HBP and CBP. The reductions in CBP were correlated with those of HBP (systolic BP; r=0.66, B=0.48, diastolic BP; r=0.71, B=0.52, P<0.001). In 7 studies that also included 24-hour BP monitoring, the reduction of HBP was greater than that of 24-hour BP in systolic (HBP; -12.6+/-0.06 mm Hg, 24-hour BP; -11.9+/-0.04 mm Hg, P<0.001). In 5 studies that included daytime and nighttime systolic BP separately, HBP decreased 15% more than daytime ambulatory BP and 30% more than nighttime ambulatory BP. In conclusion, HBP falls approximately 20% less than CBP with antihypertensive treatments. Daytime systolic BP falls 15% less and nighttime systolic BP falls 30% less than home systolic BP.

Systematic review of home telemonitoring for chronic diseases: the evidence base

OBJECTIVE

Home telemonitoring represents a patient management approach combining various information technologies for monitoring patients at distance. This study presents a systematic review of the nature and magnitude of outcomes associated with telemonitoring of four types of chronic illnesses: pulmonary conditions, diabetes, hypertension, and cardiovascular diseases.

METHODS

A comprehensive literature search was conducted on Medline and the Cochrane Library to identify relevant articles published between 1990 and 2006. A total of 65 empirical studies were obtained (18 pulmonary conditions, 17 diabetes, 16 cardiac diseases, 14 hypertension) mostly conducted in the United States and Europe.

RESULTS

The magnitude and significance of the telemonitoring effects on patients' conditions (e.g., early detection of symptoms, decrease in blood pressure, adequate medication, reduced mortality) still remain inconclusive for all four chronic illnesses. However, the results of this study suggest that regardless of their nationality, socioeconomic status, or age, patients comply with telemonitoring programs and the use of technologies. Importantly, the telemonitoring effects on clinical effectiveness outcomes (e.g., decrease in the emergency visits, hospital admissions, average hospital length of stay) are more consistent in pulmonary and cardiac studies than diabetes and hypertension. Lastly, economic viability of telemonitoring was observed in very few studies and, in most cases, no in-depth cost-minimization analyses were performed.

CONCLUSION

Home telemonitoring of chronic diseases seems to be a promising patient management approach that produces accurate and reliable data, empowers patients, influences their attitudes and behaviors, and potentially improves their medical conditions. Future studies need to build evidence related to its clinical effects, cost effectiveness, impacts on services utilization, and acceptance by health care providers.